package com.neusoft.elm.dao.impl;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import com.neusoft.elm.dao.FoodDao;
import com.neusoft.elm.po.Food;
import com.neusoft.elm.util.DBUtil;
public class FoodDaoImpl implements FoodDao{
 
 private Connection con = null;
 private PreparedStatement pst = null;
 private ResultSet rs = null;
 @Override
 public List<Food> listFoodByBusinessId(Integer businessId) {
 List<Food> list = new ArrayList<>();
 String sql = "select * from food where businessId=?";
 try {
 con = DBUtil.getConnection();
 pst = con.prepareStatement(sql);
 pst.setInt(1, businessId);
 rs = pst.executeQuery();
 while(rs.next()) {
 Food food = new Food();
 food.setFoodId(rs.getInt("foodId"));
 food.setFoodName(rs.getString("foodName"));
 food.setFoodExplain(rs.getString("foodExplain"));
 food.setFoodPrice(rs.getDouble("foodPrice"));
 food.setBusinessId(rs.getInt("businessId"));
 list.add(food);
 }
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 DBUtil.close(rs, pst, con);
 }
 return list;
 }
 
 @Override
 public int saveFood(Food food) {
 int result = 0;
 String sql = "insert into food values(null,?,?,?,?)";
 try {
 con = DBUtil.getConnection();
 pst = con.prepareStatement(sql);
 pst.setString(1, food.getFoodName());
 pst.setString(2, food.getFoodExplain());
 pst.setDouble(3, food.getFoodPrice());
 pst.setInt(4, food.getBusinessId());
 result = pst.executeUpdate();
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 DBUtil.close(null, pst, con);
 }
 return result;
 }
 
 @Override
 public Food getFoodById(Integer foodId) {
 Food food = null;
 String sql = "select * from food where foodId=?";
 try {
 con = DBUtil.getConnection();
 pst = con.prepareStatement(sql);
 pst.setInt(1, foodId);
 rs = pst.executeQuery();
 while(rs.next()) {
 food = new Food();
 food.setFoodId(rs.getInt("foodId"));
 food.setFoodName(rs.getString("foodName"));
 food.setFoodExplain(rs.getString("foodExplain"));
 food.setFoodPrice(rs.getDouble("foodPrice"));
 food.setBusinessId(rs.getInt("businessId"));
 }
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 DBUtil.close(rs, pst, con);
 }
 return food;
 }
 
 @Override
 public int updateFood(Food food) {
 int result = 0;
 String sql = "update food set foodName=?,foodExplain=?,foodPrice=? where foodId=?";
 try {
 con = DBUtil.getConnection();
 pst = con.prepareStatement(sql);
 pst.setString(1, food.getFoodName());
 pst.setString(2, food.getFoodExplain());
 pst.setDouble(3, food.getFoodPrice());
 pst.setInt(4, food.getFoodId());
 result = pst.executeUpdate();
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 DBUtil.close(null, pst, con);
 }
 return result;
 }
 
 @Override
 public int removeFood(Integer foodId) {
 int result = 0;
 String sql = "delete from food where foodId=?";
 try {
 con = DBUtil.getConnection();
 pst = con.prepareStatement(sql);
 pst.setInt(1, foodId);
 result = pst.executeUpdate();
 } catch (SQLException e) {
 e.printStackTrace();
 } finally {
 DBUtil.close(null, pst, con);
 }
 return result;
 }
}